Without a Trace Episode 5.21 Crash and Burn

Mark O'Neil watches the sunrise outside his kitchen window, apprehensive about the day of work ahead. His girlfriend, Meg, tells him not to worry -- it's just a day like many others. He promises to be home for dinner and leaves. A few hours later we find Mark wearing a security guard uniform, patrolling a loading dock. Mark investigates an abandoned truck and as he opens the door, BOOM!!! The truck explodes and Mark bursts into flame. He flounders, on fire, and falls to the ground. Assistants converge with fire extinguishers and we reveal Mark is a stunt man on a movie set. As he walks away from the stunt to crew applause, Mark vanishes...

Our Agents arrive on the scene and get word that shortly before his disappearance Mark had an argument with another stunt man, Jimmy, who was bumped from the fire gig when Mark called in a favor to get himself hired for the job. Digging further, we discover that Mark got Jimmy fired from a previous job for drinking and he's had trouble working since. Did Jimmy retaliate? Or, did an enemy from Mark's past come back to settle a score? Meg says Mark used to be a philandering hothead but changed his ways after a motocross accident seriously injured his best friend, Hugh a year ago. The investigation seems to hit a dire dead end when we find Mark's car, abandoned and set ablaze. But when our agents locate a recently changed will and testament in which Mark leaves everything in his estate to Hugh, we look closer-- did Hugh kill his friend to get the money? Or was Mark struggling to cope with a desperate request from Hugh? As we wade into the secrets of this friendship, we uncover the tragic irony that Mark's survivor's guilt may have ultimately led to his disappearance.